Portion of an article of footwear



FIG. 1 is a perspective view of a portion of an article of footwear comprising the design of the invention.

FIG. 2 is a bottom plan view of the article of FIG. 1.

FIG. 3 is a top plan view of the article of FIG. 1.

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front elevational view of the article of FIG. 1; and,

FIG. 7 is a rear elevational view of the article of FIG. 1.

The broken lines showing a footwear upper and periphery in FIGS. 1-7 represent the portions of the design that form no part of the claim. The outermost broken line forming an oval shape in FIGS. 1 and 2 defines the boundary of the design. The broken line and the area within, form no part of the claim. 

The ornamental design for a portion of an article of footwear, as shown and described. 